Hi guys, I just got a 4pk frm my fren... But there is problem... The grip vibration function is not functioning... According to my fren, he never used it before... Guys, help me out on this.. I have already checked thru my manual book but still not functioning... And also tried the setting but still no use... Any other method to make it work??..

i bought mine a couple of weeks ago brand new from a local hobby shop. just started now to play around with the function and notice i dont have the vibration action.

those who know what's the cause please help. thanks.